Sheet-glass-drawing apparatus



April 26, 1927.l

J. L. pRAKjf ,SHEET GLASS: DRAWING APPARATUS Filed Aug. 2, ,192e

without injury.

-paratus comprising a plurality o JOHN I.. nanna, or sotano, osso,

contr?, or rompo, maro, A oonronarron or Voo.v 4snsaromas-nastri noarman'true.l

The present invention relates to improvements 1n sheet glass apparatus,and has moreparticular reference dto a novel draw vColburn Patent1,248,809, granted'llee. Y 191,7, a' vsheet 10 is continuously drawnfroni' to provi e a draw table for use inasheetw table and drivingmechanism therefor.'-

An im ortant objectof the invention iS glass apparatus, so constructedthat it will present a substantially unbroken surface upon which ythesheet may be supported Another object of the'invention is to provide adraw table having associated therewith, means for positively driving theSame so thatA any danger of the draw table slipl5 ping will be reducedto a minimum.

Another object of the invention is to provide such an improved drawtable embodying a plurality of substantially `solid portions extendingthe entire width of the draw 20 table, and a plurality of open portionsalternately arranged, with the substantially solid portions.

Another object of the invention is to provide a draw table for use in,sheet lass apclosely associated links and a plurality of spaced links'pivotally connected' with the closely associated links whereby toprovide a sub stantially unbroken surface upon which the sheet of glammay be supported, said draw.

table vbeing driven by means of a sprocketor the likeengaging the spacedlinks.

Other objects and advantages of the 1nvention' will become more readilyapparent during the course of the following description when taken inconnection with the accompanying drawings. y

In the drawings wherein like characters of reference have been employedto desigfO nate corresponding parts throughout the several views:

Fig. 1 is a vertical longitudinal section.

through a portion of a sheet glass drawing apparatus illustrating myimproved device 115 associated therewith,

Fig. 2 is a transverse section through a portion of the draw tableandthe driving mechanism therefor,

Fig. 3 is a perspective view of aportion of the draw table,

Fig. 4 is aplan view of a draw table shown in Fig. 3,

Fig. 5 is asimilar view showing a somen What modilied type of link, and'f portion of the application mea segun a, dass. semina.' lactosa.V

Fig. 6 isla similar furthermodified form of the invention...

a mass of molten "glass'11, contained in a' draw pot 12. Thls sheet i 1na vertical iected lateral y View showing a aan'l In the -Colburn.machineset forth'iiiths Assmann 'ro 'ma LmBnY-os siriana i,

till* is initially` dratvnr; lane, after which it is dsa-If over a roll13 and thon* passed over an idler roll 14.. .A draw tahie in properlycondition; f,

ing the glass to permit the sheet to be drawn from the draw pot 12, andedge engaging.,

means 18 are provided to make it possible."

to draw a sheetcontinuously- .from a. mass of molten glass withoutnarroamingv atv its base. The clamp bars 15 are sooonstructed that theyengage or .clamp the by the edge engaginoi means 15, 'and are edgesformed driven by means of the sprockets 19. yThe sheet is then permittedto pass through an annealing leer, after which' it is stood. Theannealing paratus are not shown in the. dra-wings; 1 The type of drawtable disclosed in the.

cut up into commercial` sizes as will be readily under..

leer and cutting apt" Colburn patent comprises a plurality of straightsided links, that a relatively large adjacent links. This t not beenfound entire sheet of glass supportedy is comparatively soft so to anysurface distortion.

being so constructed satisfactory as the that it is susceptible gap isfor-medi between pe of draw table has upon the drawtable Being softthcVglass will have a tendency to sag within the gaps between the ends ofadjacent links, thus creating surface irregularities in the sheet;

In'a'ddition to gaps, hot gases are against the sheet forming puii'edplaces.'

:the tendencyto sag in the In Fig. l'the numeral 20 designates 'theldraw table in' itsentirety, and it is com posed of a plurality ofinterlocking links so constructed as to produce an endless belt edwithin' the loop of the;

formation. Arran draw` table 2O an adapted to support the' permitted tololowy up same in its upper horizontal run, are suitable draw tablerails 2Lsupported upon beams 22. j

The draw table'20.- is adapted to he rotated b meansl of sprockets 23,mounted upon s afts 2d and keyed thereto by links 27 comprises-a bodyportion 29 pro` vided at its opposite ends with reduced apertured earsandl, said ears being disposed equi-distant from the opposite edges ofthe body to define shoulders 82, and these shoul ders are approximatelyone-half the width of the ears 30 and 31. The links 27'are adapted toabut against one another in order to present a substantially solidsurface extending the entire Width of the draw table, and the adjacentends of the links 28 are received within the spaces between'the ears 30and 31. The links 28 are spaced from one another and each of said linksconsists simply of al fiat substantially rectangular bar having curvedends. The pivot pins 33 are passed through'sthe ears 30 and 31, and theadjacent apertured ends of the links 28. In driving the draw table, theteeth 34 of' the sprockets 23 Will be received b tween the spaced links28 so that the dra table will be positively driven, and any danger of te same slipping will be reduced to a minimum. As shown in Fig. 2, thesprockets 28 extend transversely the entire width of the draw table sothat a uniform driving action will be imparted to the draw tablethroughout its entire Width.

In Fig. 5 has been shown a slightly modied form of construction whereinthe closely associated links 35 are provided at their opposite ends Withnotches 86, which result in the formation of ears 37, said ears being inalignment with one another at one side of the longitudinal axis of thelink. The

ladjacent ends of the spaced links 28 are adapted to be received Withinthe notches 36, and pivot ,pins 38, passing through the ears 37 andadjacent ends of the links 28, serve to pivotally connect the said linkstogether.

In Fig. 6, a still further modified form of draw table has been shown,and in this form of the invention there are provided a plurality oftransversely extending plates or bars 39 which are alternately arrangedwith the spaced links 28. Each of the bars 39 is provided along itslongitudinal edges with spaced ears 40, and the adjacent endsorl thelinks 28 are received within thel spaces between these ears. Pivot pins41, passing through the ears 40 and adjacent ends of the links 28, serveto pivotally connect the links together.

It will be thus seen` that in all three forms of the invention set forthabove, there is rovided a draw table embodying a plural-v ity ofsubstantially solid portions, and a plurality of open portions arrangedalter- A roll 26 isused to contact v masses nately with the solidportions. The draw tables provided by the present invention will presenta substantially unbroken surface upon Which the sheet may be supportedwithout injury, and in addition thereto .1. In sheet glass apparatus, adraw tablel having substantially solid portions and open portions,extending the entire width of the draw'v table, and means for driving'the' said dran1 table.

2. In sheet glass apparatus, a draw table having substantially solidportions and open portions, said substantially solid portions the scopeof the ap said substantially solid portions.

extending the entire Width of the draw table, l

and means engaging the open portions for driving the said draw'table.

3. In sheet glass apparatus, a draw table having substantially solidportions and open portions, said substantially solid portions extendingthe entire width of the draw table, and a sprocket for driving said drawtable,

4. In sheet glass apparatus, a draw table having substantially solidportions and spaced portions, said substantially solid por- 'tionsextending the entire Width of the draw table, and a sprocket engagingthe spaced -portions for driving said draw table.

5. In sheet glass apparatus, a draw table having' substantially solidportions and spaced portions alternately arranged,said substantiallysolid portionsextending the yentire Width of the draw table, and asprocket engaging the spaced portions tor driving said dranr table.

6. In sheet glass apparatus, a draw table including a plurality otcloselyassociated links and a plurality of spaced links, and means fordriving said draw table.

7. In sheet glass apparatus, a draw table including a plurality ofclosely associated links, and a plurality of spaced links, and meansengaging the spaced links for driving said draw table.

8. In sheet glass apparatus, a draw table p including a plurality ofclosely. associated links, and a plurality of spaced links, and a isprocket for driving the said draw table.

9. In sheet lass apparatus, a draw table including a p urality ofclosely associated links and a plurality of spaced links, and alsprocket engaging-the spaced links for dr1v` ing said draw table. 10. Insheet glass apparatus, a draw table including a p'lurzility of linkscloselyiassociated to'provide` a substantially solid surciatd to form asubstantially solid surface, plurality of spaced links arranged face anda a plurality of spaced links, and a sprocket, alternately with theclosely associated links. 10 the' teeth of whlch' are received betweenthe Signed atl Toledo, in the county` of Lucas 5 spaced links fordriving said drfw table. and State' of Ohio, this 31st day of July,

11. In sheet glass apparatus, a'draw tablel 1926. including a plurality'of linkslclosely assop JOHN L. DRAKE.

